Display apparatus

This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0084873, filed on Jun. 29, 2021, in the Korean Intellectual Property Office, the entire content of which is hereby incorporated by reference.

One or more embodiments of the present disclosure relate to a display apparatus, and for example, to a display apparatus having improved visibility.

An organic light-emitting display apparatus is self-luminous. Unlike a liquid crystal display apparatus, the organic light-emitting display apparatus does not require a separate light source, and thus, the thickness and weight thereof may be reduced. Also, the organic light-emitting display apparatus has high quality characteristics such as low power consumption, high luminance, and fast response time.

However, in the case of an existing display apparatus, visibility deteriorates due to the reflection of external light.

One or more embodiments of the present disclosure include a display apparatus in which a low-reflection layer and a reflection control layer are on a light-emitting element, thereby improving visibility. However, this is merely an example, and the scope of the disclosure is not limited thereby.

Additional aspects of embodiments will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments of the disclosure.

According to one or more embodiments, a display apparatus includes a substrate, a light-emitting element on the substrate, a low-reflection layer on the light-emitting element, the low-reflection layer including an inorganic material, and a reflection control layer on the low-reflection layer, the reflection control layer being configured to absorb light in at least three wavelength bands selected from a first wavelength band of 430 nm or less, a second wavelength band of 480 nm to 510 nm, a third wavelength band of 575 nm to 605 nm, and a fourth wavelength band of 650 nm or greater.

In the present embodiment, the reflection control layer may include at least three light absorbing materials selected from a first light absorbing material that absorbs light in the first wavelength band, a second light absorbing material that absorbs light in the second wavelength band, a third light absorbing material that absorbs light in the third wavelength band, and a fourth light absorbing material that absorbs light in the fourth wavelength band.

In the present embodiment, an amount of each of the at least three light absorbing materials may be 0.005 wt % to 5 wt %, based on the total weight of the reflection control layer.

In the present embodiment, the inorganic material may have a refractive index of 1 or greater.

In the present embodiment, the inorganic material may have an absorption coefficient of 0.5 or greater.

In the present embodiment, the inorganic material may include ytterbium (Yb), bismuth (Bi), cobalt (Co), molybdenum (Mo), titanium (Ti), zirconium (Zr), aluminum (Al), chromium (Cr), niobium (Nb), platinum (Pt), tungsten (W), indium (In), tin (Sn), iron (Fe), nickel (Ni), tantalum (Ta), manganese (Mn), zinc (Zn), germanium (Ge), or any combination thereof.

In the present embodiment, the display apparatus may further include a light blocking layer on the light-emitting element, the light-emitting element having an opening corresponding to an emission area of the light-emitting element.

In the present embodiment, the reflection control layer may fill the opening.

In the present embodiment, the display apparatus may further include a touch sensor layer between the low-reflection layer and the reflection control layer, wherein the light blocking layer may be on the touch sensor layer.

In the present embodiment, the display apparatus may further include a capping layer between the light-emitting element and the low-reflection layer.

In the present embodiment, the display apparatus may further include an encapsulation member on the low-reflection layer.

In the present embodiment, the encapsulation member may include an encapsulation substrate, and a filler may be further between the low-reflection layer and the encapsulation substrate.

According to one or more embodiments, a display apparatus includes a substrate, a first light-emitting element, a second light-emitting element, and a third light-emitting element on the substrate, the first light-emitting element, the second light-emitting element, and the third light-emitting element being configured to emit light in different colors from each other, a low-reflection layer arranged as one body on the first to third light-emitting elements and including an inorganic material, and a reflection control layer that is on the low-reflection layer and is configured to absorb light in at least three wavelength bands selected from a first wavelength band of 430 nm or less, a second wavelength band of 480 nm to 510 nm, a third wavelength band of 575 nm to 605 nm, and a fourth wavelength band of 650 nm or greater.

In the present embodiment, the reflection control layer may include at least three light absorbing materials selected from a first light absorbing material that absorbs light in the first wavelength band, a second light absorbing material that absorbs light in the second wavelength band, a third light absorbing material that absorbs light in the third wavelength band, and a fourth light absorbing material that absorbs light in the fourth wavelength band, and an amount of each of the at least three light absorbing materials may be 0.005 wt % to 5 wt %, based on the total weight of the reflection control layer.

In the present embodiment, the inorganic material may have a refractive index of 1 or greater and an absorption coefficient of 0.5 or greater and may include ytterbium (Yb), bismuth (Bi), cobalt (Co), molybdenum (Mo), titanium (Ti), zirconium (Zr), aluminum (Al), chromium (Cr), niobium (Nb), platinum (Pt), tungsten (W), indium (In), tin (Sn), iron (Fe), nickel (Ni), tantalum (Ta), manganese (Mn), zinc (Zn), germanium (Ge), or any combination thereof.

In the present embodiment, the display apparatus may further include a light blocking layer on the light-emitting element, the light blocking layer having an opening corresponding to an emission area of the light-emitting element, wherein the reflection control layer may fill the opening.

In the present embodiment, the display apparatus may further include an encapsulation member on the low-reflection layer, a touch sensor layer between the low-reflection layer and the reflection control layer, and a capping layer between the light-emitting element and the low-reflection layer, wherein the light blocking layer may be on the touch sensor layer.

In the present embodiment, the encapsulation member may include a thin-film encapsulation layer including at least one inorganic layer and at least one organic layer.

In the present embodiment, the encapsulation member may include an encapsulation substrate, and a filler may be further between the low-reflection layer and the encapsulation substrate.

Other aspects and features of embodiments the disclosure will become better understood through the accompanying drawings, the claims and the detailed description.

Reference will now be made in more detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments are merely described below, by referring to the figures, to explain aspects of embodiments of the present description. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Throughout the disclosure, the expression “at least one of a, b or c” indicates only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variations thereof.

As the present description allows for various changes and numerous embodiments, certain embodiments will be illustrated in the drawings and described in more detail in the written description. Effects and features of the disclosure, and methods of achieving them will be clarified with reference to embodiments described below in more detail with reference to the drawings. However, the disclosure is not limited to the following embodiments and the subject matter of the present disclosure may be embodied in various forms.

It will be understood that although the terms “first,” “second,” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

The singular forms “a,” “an,” and “the” as used herein are intended to include the plural forms as well unless the context clearly indicates otherwise.

It will be further understood that the terms “comprises” and/or “comprising” used herein specify the presence of stated features or elements, but do not preclude the presence or addition of one or more other features or elements.

It will be further understood that, when a layer, region, or element is referred to as being “on” another layer, region, or element, it can be directly or indirectly on the other layer, region, or element. That is, for example, intervening layers, regions, or elements may be present.

Also, sizes of elements in the drawings may be exaggerated or reduced for convenience of explanation. In addition, because sizes and thicknesses of elements in the drawings may be arbitrarily illustrated for convenience of explanation, the disclosure is not limited thereto.

In this specification, the expression “A and/or B” indicates only A, only B, or both A and B. Throughout the disclosure, the expression “at least one of A and B” indicates only A, only B, or both A and B.

In the following embodiments, the expression “a line extends in a first direction or a second direction” may include a case in which “a line extends in a linear shape” and a case in which “a line extends in a zigzag or curved shape in a first direction or a second direction.”

In the following embodiments, the term “in a plan view” means seeing a target portion from above, and the term “in a cross-sectional view” means seeing a vertically cut cross-section of a target portion from a side. In the following embodiments, the term “overlapping” may include overlapping “in a plan view” and/or “in a cross-sectional view.”

Hereinafter, embodiments will be described in more detail with reference to the accompanying drawings. When describing embodiments with reference to the accompanying drawings, the same or corresponding elements are denoted by the same reference numerals.

is a perspective view schematically illustrating a display apparatus 1 according to an embodiment.

Referring to, the display apparatus 1 according to an embodiment may include a display area DA and a non-display area NDA outside the display area DA. Althoughillustrates that the display area DA has a rectangular shape, the disclosure is not limited thereto. The display area DA may have various suitable shapes such as a circular shape, an elliptical shape, or a polygonal shape.

The display area DA is an area that displays an image, and a plurality of sub-pixels PX may be arranged in the display area DA. Each of the sub-pixels PX may include a light-emitting element such as an organic light-emitting diode (OLED). Each of the sub-pixels PX may emit, for example, red light, green light, blue light, or white light.

The display area DA may provide a certain image through light emitted from the sub-pixels PX. As described above, the sub-pixel PX in this specification may be defined as an emission area configured to emit light of any one color selected from among red, green, blue, and white.

The non-display area NDA is an area in which the sub-pixels PX are not arranged and an image is not designed to be provided. Pads connected to a driver integrated circuit (IC) or a printed circuit board including a driving circuit and a power supply line configured to drive the sub-pixels PX may be arranged in the non-display area NDA.

Hereinafter, an organic light-emitting display apparatus will be described as an example of the display apparatus 1 according to an embodiment. However, the display apparatus 1 according to the disclosure is not limited thereto. For example, the display apparatus 1 according to the disclosure may include an inorganic light-emitting display apparatus (or an inorganic electroluminescence (EL) display apparatus) or a quantum dot light-emitting display apparatus. For example, a light-emitting layer included in the light-emitting element included in the display apparatus may include an organic material or an inorganic material. Quantum dots may be positioned on a path of light emitted from the emission layer.

is a cross-sectional view schematically illustrating a display apparatus 1 according to an embodiment, andare enlarged views of region A of.is a cross-sectional view of the display apparatus 1 taken along line I-I′ of.

Referring to, the display apparatus 1 according to an embodiment may include a substrate, a display layer, a low-reflection layer, an encapsulation member, a touch sensor layer, and an anti-reflective layer.

The substratemay include glass and/or a polymer resin. For example, the polymer resin may include polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, and/or cellulose acetate propionate. The substrateincluding the polymer resin may be flexible, rollable, and/or bendable. The substratemay have a multilayer structure that includes an inorganic layer and a layer including the above-described polymer resin.

The display layermay include an OLED, which is a light-emitting element, a thin-film transistor electrically connected to the OLED, and insulating layers therebetween.

The low-reflection layermay be on the display layer, and the encapsulation membermay be on the low-reflection layer. For example, the display layerand/or the low-reflection layermay be sealed with or by the encapsulation member.

As illustrated in, the encapsulation membermay include a thin-film encapsulation layerincluding at least one inorganic layer and at least one organic layer. In some embodiments, the thin-film encapsulation layermay include a first inorganic layer, a second inorganic layer, and an organic layertherebetween.

The first inorganic layerand the second inorganic layermay include an inorganic insulating material such as silicon oxide (SiO), silicon nitride (SiNx), silicon oxynitride (SiON), aluminum oxide (AlO), titanium oxide (TiO), tantalum oxide (TaO), hafnium oxide (HfO), and/or zinc oxide (ZnO). The first inorganic layerand the second inorganic layermay have a single-layer structure or a multilayer structure including the above-described inorganic insulating material.